Question

我有一个自定义的segue：

-(void)perform {

    __block UIViewController *sourceViewController = (UIViewController*)[self sourceViewController];
    __block UIViewController *destinationController = (UIViewController*)[self destinationViewController];

    float duration = 0.5;

    NSLog(@"FlipSegue.m - source:%@ dest:%@", sourceViewController, destinationController);

     if (self.isUnwinding) {
         NSLog(@"FlipSegue.m - isUndwinding - Flipping View 2 to View 1");
         //[sourceViewController.navigationController dismissViewControllerAnimated:NO completion:nil];
         [UIView transitionWithView:sourceViewController.navigationController.view duration:duration
                            options:UIViewAnimationOptionTransitionFlipFromLeft
                         animations:^{
                             [sourceViewController.navigationController dismissViewControllerAnimated:NO completion:nil];
                         }
                         completion:NULL];
     } else {
         NSLog(@"FlipSegue.m - Going Forward - Flipping View 1 to View 2");
         //[sourceViewController.navigationController pushViewController:destinationController animated:NO];
         [UIView transitionWithView:sourceViewController.navigationController.view duration:duration
                            options:UIViewAnimationOptionTransitionFlipFromLeft
                         animations:^{
                             [sourceViewController.navigationController pushViewController:destinationController animated:NO];
                         }
                         completion:NULL];
     }

}

我使用segue设置了unwind segue和storyboard。

我已经使用UINavigationController进行了子类化，并使用- (UIStoryboardSegue *)segueForUnwindingToViewController:(UIViewController *)toViewController fromViewController:(UIViewController *)

获取自定义展开segue

当我从View 1调用segue到View 2时，它会按预期工作。

当我调用展开segue时，View 2会翻转，但会再次显示View 2。代码的isUnwinding部分会触发，但View 1永远不会重新出现。

有关如何解决此问题的任何提示将不胜感激。

Answer 1

你是否在故事板中设置了展开segue？

在ViewController中添加- (IBAction)unwind:(UIStoryboardSegue *)segue; 1.转到storyboard中的view2。按住Ctrl键从视图拖动退出。选择展开方法。转到故事板中的大纲，然后单击刚刚制作的展开segue。将其类更改为自定义segue。

Answer 2

正如@JoshGafni所建议的那样，我能够通过使用popToRootViewController来解决这个问题并且稍微讨论一下代码。 Push / Pop正在运行但我无法在不向现有代码添加其他问题的情况下使用Present / Dismiss。

这是最终结果：

if (self.isUnwinding) {
         NSLog(@"FlipSegue.m - isUndwinding - Flipping View 2 to View 1");

         [UIView transitionWithView:sourceViewController.navigationController.view
                           duration:duration
                            options:UIViewAnimationOptionTransitionFlipFromLeft
                         animations:^{
                             [sourceViewController.navigationController popToRootViewControllerAnimated:NO];
                         }
                         completion:nil];
     } else {
         NSLog(@"FlipSegue.m - Going Forward - Flipping View 1 to View 2");

         [UIView transitionWithView:sourceViewController.navigationController.view duration:duration
                            options:UIViewAnimationOptionTransitionFlipFromLeft
                         animations:^{
                             [sourceViewController.navigationController pushViewController:destinationController animated:NO];
                         }
                         completion:nil];
     }

尝试使用UIViewAnimationOptionTransitionFlipFromLeft展开自定义Segue

2 个答案: